1/*
   2 * Copyright 2005-2006 Erik Waling
   3 * Copyright 2006 Stephane Marchesin
   4 * Copyright 2007-2009 Stuart Bennett
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a
   7 * copy of this software and associated documentation files (the "Software"),
   8 * to deal in the Software without restriction, including without limitation
   9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10 * and/or sell copies of the Software, and to permit persons to whom the
  11 * Software is furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  21 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22 * SOFTWARE.
  23 */
  24
  25#include <drm/drmP.h>
  26
  27#include "nouveau_drm.h"
  28#include "nouveau_reg.h"
  29#include "dispnv04/hw.h"
  30#include "nouveau_encoder.h"
  31
  32#include <linux/io-mapping.h>
  33#include <linux/firmware.h>
  34
  35/* these defines are made up */
  36#define NV_CIO_CRE_44_HEADA 0x0
  37#define NV_CIO_CRE_44_HEADB 0x3
  38#define FEATURE_MOBILE 0x10	/* also FEATURE_QUADRO for BMP */
  39
  40#define EDID1_LEN 128
  41
  42#define BIOSLOG(sip, fmt, arg...) NV_DEBUG(sip->dev, fmt, ##arg)
  43#define LOG_OLD_VALUE(x)
  44
  45struct init_exec {
  46	bool execute;
  47	bool repeat;
  48};
  49
  50static bool nv_cksum(const uint8_t *data, unsigned int length)
  51{
  52	/*
  53	 * There's a few checksums in the BIOS, so here's a generic checking
  54	 * function.
  55	 */
  56	int i;
  57	uint8_t sum = 0;
  58
  59	for (i = 0; i < length; i++)
  60		sum += data[i];
  61
  62	if (sum)
  63		return true;
  64
  65	return false;
  66}
  67
  68static uint16_t clkcmptable(struct nvbios *bios, uint16_t clktable, int pxclk)
  69{
  70	int compare_record_len, i = 0;
  71	uint16_t compareclk, scriptptr = 0;
  72
  73	if (bios->major_version < 5) /* pre BIT */
  74		compare_record_len = 3;
  75	else
  76		compare_record_len = 4;
  77
  78	do {
  79		compareclk = ROM16(bios->data[clktable + compare_record_len * i]);
  80		if (pxclk >= compareclk * 10) {
  81			if (bios->major_version < 5) {
  82				uint8_t tmdssub = bios->data[clktable + 2 + compare_record_len * i];
  83				scriptptr = ROM16(bios->data[bios->init_script_tbls_ptr + tmdssub * 2]);
  84			} else
  85				scriptptr = ROM16(bios->data[clktable + 2 + compare_record_len * i]);
  86			break;
  87		}
  88		i++;
  89	} while (compareclk);
  90
  91	return scriptptr;
  92}
  93
  94static void
  95run_digital_op_script(struct drm_device *dev, uint16_t scriptptr,
  96		      struct dcb_output *dcbent, int head, bool dl)
  97{
  98	struct nouveau_drm *drm = nouveau_drm(dev);
  99
 100	NV_INFO(drm, "0x%04X: Parsing digital output script table\n",
 101		 scriptptr);
 102	NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_44, head ? NV_CIO_CRE_44_HEADB :
 103					         NV_CIO_CRE_44_HEADA);
 104	nouveau_bios_run_init_table(dev, scriptptr, dcbent, head);
 105
 106	nv04_dfp_bind_head(dev, dcbent, head, dl);
 107}
 108
 109static int call_lvds_manufacturer_script(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script)
 110{
 111	struct nouveau_drm *drm = nouveau_drm(dev);
 112	struct nvbios *bios = &drm->vbios;
 113	uint8_t sub = bios->data[bios->fp.xlated_entry + script] + (bios->fp.link_c_increment && dcbent->or & DCB_OUTPUT_C ? 1 : 0);
 114	uint16_t scriptofs = ROM16(bios->data[bios->init_script_tbls_ptr + sub * 2]);
 115
 116	if (!bios->fp.xlated_entry || !sub || !scriptofs)
 117		return -EINVAL;
 118
 119	run_digital_op_script(dev, scriptofs, dcbent, head, bios->fp.dual_link);
 120
 121	if (script == LVDS_PANEL_OFF) {
 122		/* off-on delay in ms */
 123		mdelay(ROM16(bios->data[bios->fp.xlated_entry + 7]));
 124	}
 125#ifdef __powerpc__
 126	/* Powerbook specific quirks */
 127	if (script == LVDS_RESET &&
 128	    (dev->pdev->device == 0x0179 || dev->pdev->device == 0x0189 ||
 129	     dev->pdev->device == 0x0329))
 130		nv_write_tmds(dev, dcbent->or, 0, 0x02, 0x72);
 131#endif
 132
 133	return 0;
 134}
 135
 136static int run_lvds_table(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script, int pxclk)
 137{
 138	/*
 139	 * The BIT LVDS table's header has the information to setup the
 140	 * necessary registers. Following the standard 4 byte header are:
 141	 * A bitmask byte and a dual-link transition pxclk value for use in
 142	 * selecting the init script when not using straps; 4 script pointers
 143	 * for panel power, selected by output and on/off; and 8 table pointers
 144	 * for panel init, the needed one determined by output, and bits in the
 145	 * conf byte. These tables are similar to the TMDS tables, consisting
 146	 * of a list of pxclks and script pointers.
 147	 */
 148	struct nouveau_drm *drm = nouveau_drm(dev);
 149	struct nvbios *bios = &drm->vbios;
 150	unsigned int outputset = (dcbent->or == 4) ? 1 : 0;
 151	uint16_t scriptptr = 0, clktable;
 152
 153	/*
 154	 * For now we assume version 3.0 table - g80 support will need some
 155	 * changes
 156	 */
 157
 158	switch (script) {
 159	case LVDS_INIT:
 160		return -ENOSYS;
 161	case LVDS_BACKLIGHT_ON:
 162	case LVDS_PANEL_ON:
 163		scriptptr = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 7 + outputset * 2]);
 164		break;
 165	case LVDS_BACKLIGHT_OFF:
 166	case LVDS_PANEL_OFF:
 167		scriptptr = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 11 + outputset * 2]);
 168		break;
 169	case LVDS_RESET:
 170		clktable = bios->fp.lvdsmanufacturerpointer + 15;
 171		if (dcbent->or == 4)
 172			clktable += 8;
 173
 174		if (dcbent->lvdsconf.use_straps_for_mode) {
 175			if (bios->fp.dual_link)
 176				clktable += 4;
 177			if (bios->fp.if_is_24bit)
 178				clktable += 2;
 179		} else {
 180			/* using EDID */
 181			int cmpval_24bit = (dcbent->or == 4) ? 4 : 1;
 182
 183			if (bios->fp.dual_link) {
 184				clktable += 4;
 185				cmpval_24bit <<= 1;
 186			}
 187
 188			if (bios->fp.strapless_is_24bit & cmpval_24bit)
 189				clktable += 2;
 190		}
 191
 192		clktable = ROM16(bios->data[clktable]);
 193		if (!clktable) {
 194			NV_ERROR(drm, "Pixel clock comparison table not found\n");
 195			return -ENOENT;
 196		}
 197		scriptptr = clkcmptable(bios, clktable, pxclk);
 198	}
 199
 200	if (!scriptptr) {
 201		NV_ERROR(drm, "LVDS output init script not found\n");
 202		return -ENOENT;
 203	}
 204	run_digital_op_script(dev, scriptptr, dcbent, head, bios->fp.dual_link);
 205
 206	return 0;
 207}
 208
 209int call_lvds_script(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script, int pxclk)
 210{
 211	/*
 212	 * LVDS operations are multiplexed in an effort to present a single API
 213	 * which works with two vastly differing underlying structures.
 214	 * This acts as the demux
 215	 */
 216
 217	struct nouveau_drm *drm = nouveau_drm(dev);
 218	struct nvif_object *device = &drm->device.object;
 219	struct nvbios *bios = &drm->vbios;
 220	uint8_t lvds_ver = bios->data[bios->fp.lvdsmanufacturerpointer];
 221	uint32_t sel_clk_binding, sel_clk;
 222	int ret;
 223
 224	if (bios->fp.last_script_invoc == (script << 1 | head) || !lvds_ver ||
 225	    (lvds_ver >= 0x30 && script == LVDS_INIT))
 226		return 0;
 227
 228	if (!bios->fp.lvds_init_run) {
 229		bios->fp.lvds_init_run = true;
 230		call_lvds_script(dev, dcbent, head, LVDS_INIT, pxclk);
 231	}
 232
 233	if (script == LVDS_PANEL_ON && bios->fp.reset_after_pclk_change)
 234		call_lvds_script(dev, dcbent, head, LVDS_RESET, pxclk);
 235	if (script == LVDS_RESET && bios->fp.power_off_for_reset)
 236		call_lvds_script(dev, dcbent, head, LVDS_PANEL_OFF, pxclk);
 237
 238	NV_INFO(drm, "Calling LVDS script %d:\n", script);
 239
 240	/* don't let script change pll->head binding */
 241	sel_clk_binding = nvif_rd32(device, NV_PRAMDAC_SEL_CLK) & 0x50000;
 242
 243	if (lvds_ver < 0x30)
 244		ret = call_lvds_manufacturer_script(dev, dcbent, head, script);
 245	else
 246		ret = run_lvds_table(dev, dcbent, head, script, pxclk);
 247
 248	bios->fp.last_script_invoc = (script << 1 | head);
 249
 250	sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK) & ~0x50000;
 251	NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, sel_clk | sel_clk_binding);
 252	/* some scripts set a value in NV_PBUS_POWERCTRL_2 and break video overlay */
 253	nvif_wr32(device, NV_PBUS_POWERCTRL_2, 0);
 254
 255	return ret;
 256}
 257
 258struct lvdstableheader {
 259	uint8_t lvds_ver, headerlen, recordlen;
 260};
 261
 262static int parse_lvds_manufacturer_table_header(struct drm_device *dev, struct nvbios *bios, struct lvdstableheader *lth)
 263{
 264	/*
 265	 * BMP version (0xa) LVDS table has a simple header of version and
 266	 * record length. The BIT LVDS table has the typical BIT table header:
 267	 * version byte, header length byte, record length byte, and a byte for
 268	 * the maximum number of records that can be held in the table.
 269	 */
 270
 271	struct nouveau_drm *drm = nouveau_drm(dev);
 272	uint8_t lvds_ver, headerlen, recordlen;
 273
 274	memset(lth, 0, sizeof(struct lvdstableheader));
 275
 276	if (bios->fp.lvdsmanufacturerpointer == 0x0) {
 277		NV_ERROR(drm, "Pointer to LVDS manufacturer table invalid\n");
 278		return -EINVAL;
 279	}
 280
 281	lvds_ver = bios->data[bios->fp.lvdsmanufacturerpointer];
 282
 283	switch (lvds_ver) {
 284	case 0x0a:	/* pre NV40 */
 285		headerlen = 2;
 286		recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 287		break;
 288	case 0x30:	/* NV4x */
 289		headerlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 290		if (headerlen < 0x1f) {
 291			NV_ERROR(drm, "LVDS table header not understood\n");
 292			return -EINVAL;
 293		}
 294		recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 2];
 295		break;
 296	case 0x40:	/* G80/G90 */
 297		headerlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 298		if (headerlen < 0x7) {
 299			NV_ERROR(drm, "LVDS table header not understood\n");
 300			return -EINVAL;
 301		}
 302		recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 2];
 303		break;
 304	default:
 305		NV_ERROR(drm,
 306			 "LVDS table revision %d.%d not currently supported\n",
 307			 lvds_ver >> 4, lvds_ver & 0xf);
 308		return -ENOSYS;
 309	}
 310
 311	lth->lvds_ver = lvds_ver;
 312	lth->headerlen = headerlen;
 313	lth->recordlen = recordlen;
 314
 315	return 0;
 316}
 317
 318static int
 319get_fp_strap(struct drm_device *dev, struct nvbios *bios)
 320{
 321	struct nouveau_drm *drm = nouveau_drm(dev);
 322	struct nvif_object *device = &drm->device.object;
 323
 324	/*
 325	 * The fp strap is normally dictated by the "User Strap" in
 326	 * PEXTDEV_BOOT_0[20:16], but on BMP cards when bit 2 of the
 327	 * Internal_Flags struct at 0x48 is set, the user strap gets overriden
 328	 * by the PCI subsystem ID during POST, but not before the previous user
 329	 * strap has been committed to CR58 for CR57=0xf on head A, which may be
 330	 * read and used instead
 331	 */
 332
 333	if (bios->major_version < 5 && bios->data[0x48] & 0x4)
 334		return NVReadVgaCrtc5758(dev, 0, 0xf) & 0xf;
 335
 336	if (drm->device.info.family >= NV_DEVICE_INFO_V0_TESLA)
 
 
 
 337		return (nvif_rd32(device, NV_PEXTDEV_BOOT_0) >> 24) & 0xf;
 338	else
 339		return (nvif_rd32(device, NV_PEXTDEV_BOOT_0) >> 16) & 0xf;
 340}
 341
 342static int parse_fp_mode_table(struct drm_device *dev, struct nvbios *bios)
 343{
 344	struct nouveau_drm *drm = nouveau_drm(dev);
 345	uint8_t *fptable;
 346	uint8_t fptable_ver, headerlen = 0, recordlen, fpentries = 0xf, fpindex;
 347	int ret, ofs, fpstrapping;
 348	struct lvdstableheader lth;
 349
 350	if (bios->fp.fptablepointer == 0x0) {
 351		/* Apple cards don't have the fp table; the laptops use DDC */
 352		/* The table is also missing on some x86 IGPs */
 353#ifndef __powerpc__
 354		NV_ERROR(drm, "Pointer to flat panel table invalid\n");
 355#endif
 356		bios->digital_min_front_porch = 0x4b;
 357		return 0;
 358	}
 359
 360	fptable = &bios->data[bios->fp.fptablepointer];
 361	fptable_ver = fptable[0];
 362
 363	switch (fptable_ver) {
 364	/*
 365	 * BMP version 0x5.0x11 BIOSen have version 1 like tables, but no
 366	 * version field, and miss one of the spread spectrum/PWM bytes.
 367	 * This could affect early GF2Go parts (not seen any appropriate ROMs
 368	 * though). Here we assume that a version of 0x05 matches this case
 369	 * (combining with a BMP version check would be better), as the
 370	 * common case for the panel type field is 0x0005, and that is in
 371	 * fact what we are reading the first byte of.
 372	 */
 373	case 0x05:	/* some NV10, 11, 15, 16 */
 374		recordlen = 42;
 375		ofs = -1;
 376		break;
 377	case 0x10:	/* some NV15/16, and NV11+ */
 378		recordlen = 44;
 379		ofs = 0;
 380		break;
 381	case 0x20:	/* NV40+ */
 382		headerlen = fptable[1];
 383		recordlen = fptable[2];
 384		fpentries = fptable[3];
 385		/*
 386		 * fptable[4] is the minimum
 387		 * RAMDAC_FP_HCRTC -> RAMDAC_FP_HSYNC_START gap
 388		 */
 389		bios->digital_min_front_porch = fptable[4];
 390		ofs = -7;
 391		break;
 392	default:
 393		NV_ERROR(drm,
 394			 "FP table revision %d.%d not currently supported\n",
 395			 fptable_ver >> 4, fptable_ver & 0xf);
 396		return -ENOSYS;
 397	}
 398
 399	if (!bios->is_mobile) /* !mobile only needs digital_min_front_porch */
 400		return 0;
 401
 402	ret = parse_lvds_manufacturer_table_header(dev, bios, &lth);
 403	if (ret)
 404		return ret;
 405
 406	if (lth.lvds_ver == 0x30 || lth.lvds_ver == 0x40) {
 407		bios->fp.fpxlatetableptr = bios->fp.lvdsmanufacturerpointer +
 408							lth.headerlen + 1;
 409		bios->fp.xlatwidth = lth.recordlen;
 410	}
 411	if (bios->fp.fpxlatetableptr == 0x0) {
 412		NV_ERROR(drm, "Pointer to flat panel xlat table invalid\n");
 413		return -EINVAL;
 414	}
 415
 416	fpstrapping = get_fp_strap(dev, bios);
 417
 418	fpindex = bios->data[bios->fp.fpxlatetableptr +
 419					fpstrapping * bios->fp.xlatwidth];
 420
 421	if (fpindex > fpentries) {
 422		NV_ERROR(drm, "Bad flat panel table index\n");
 423		return -ENOENT;
 424	}
 425
 426	/* nv4x cards need both a strap value and fpindex of 0xf to use DDC */
 427	if (lth.lvds_ver > 0x10)
 428		bios->fp_no_ddc = fpstrapping != 0xf || fpindex != 0xf;
 429
 430	/*
 431	 * If either the strap or xlated fpindex value are 0xf there is no
 432	 * panel using a strap-derived bios mode present.  this condition
 433	 * includes, but is different from, the DDC panel indicator above
 434	 */
 435	if (fpstrapping == 0xf || fpindex == 0xf)
 436		return 0;
 437
 438	bios->fp.mode_ptr = bios->fp.fptablepointer + headerlen +
 439			    recordlen * fpindex + ofs;
 440
 441	NV_INFO(drm, "BIOS FP mode: %dx%d (%dkHz pixel clock)\n",
 442		 ROM16(bios->data[bios->fp.mode_ptr + 11]) + 1,
 443		 ROM16(bios->data[bios->fp.mode_ptr + 25]) + 1,
 444		 ROM16(bios->data[bios->fp.mode_ptr + 7]) * 10);
 445
 446	return 0;
 447}
 448
 449bool nouveau_bios_fp_mode(struct drm_device *dev, struct drm_display_mode *mode)
 450{
 451	struct nouveau_drm *drm = nouveau_drm(dev);
 452	struct nvbios *bios = &drm->vbios;
 453	uint8_t *mode_entry = &bios->data[bios->fp.mode_ptr];
 454
 455	if (!mode)	/* just checking whether we can produce a mode */
 456		return bios->fp.mode_ptr;
 457
 458	memset(mode, 0, sizeof(struct drm_display_mode));
 459	/*
 460	 * For version 1.0 (version in byte 0):
 461	 * bytes 1-2 are "panel type", including bits on whether Colour/mono,
 462	 * single/dual link, and type (TFT etc.)
 463	 * bytes 3-6 are bits per colour in RGBX
 464	 */
 465	mode->clock = ROM16(mode_entry[7]) * 10;
 466	/* bytes 9-10 is HActive */
 467	mode->hdisplay = ROM16(mode_entry[11]) + 1;
 468	/*
 469	 * bytes 13-14 is HValid Start
 470	 * bytes 15-16 is HValid End
 471	 */
 472	mode->hsync_start = ROM16(mode_entry[17]) + 1;
 473	mode->hsync_end = ROM16(mode_entry[19]) + 1;
 474	mode->htotal = ROM16(mode_entry[21]) + 1;
 475	/* bytes 23-24, 27-30 similarly, but vertical */
 476	mode->vdisplay = ROM16(mode_entry[25]) + 1;
 477	mode->vsync_start = ROM16(mode_entry[31]) + 1;
 478	mode->vsync_end = ROM16(mode_entry[33]) + 1;
 479	mode->vtotal = ROM16(mode_entry[35]) + 1;
 480	mode->flags |= (mode_entry[37] & 0x10) ?
 481			DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
 482	mode->flags |= (mode_entry[37] & 0x1) ?
 483			DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
 484	/*
 485	 * bytes 38-39 relate to spread spectrum settings
 486	 * bytes 40-43 are something to do with PWM
 487	 */
 488
 489	mode->status = MODE_OK;
 490	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 491	drm_mode_set_name(mode);
 492	return bios->fp.mode_ptr;
 493}
 494
 495int nouveau_bios_parse_lvds_table(struct drm_device *dev, int pxclk, bool *dl, bool *if_is_24bit)
 496{
 497	/*
 498	 * The LVDS table header is (mostly) described in
 499	 * parse_lvds_manufacturer_table_header(): the BIT header additionally
 500	 * contains the dual-link transition pxclk (in 10s kHz), at byte 5 - if
 501	 * straps are not being used for the panel, this specifies the frequency
 502	 * at which modes should be set up in the dual link style.
 503	 *
 504	 * Following the header, the BMP (ver 0xa) table has several records,
 505	 * indexed by a separate xlat table, indexed in turn by the fp strap in
 506	 * EXTDEV_BOOT. Each record had a config byte, followed by 6 script
 507	 * numbers for use by INIT_SUB which controlled panel init and power,
 508	 * and finally a dword of ms to sleep between power off and on
 509	 * operations.
 510	 *
 511	 * In the BIT versions, the table following the header serves as an
 512	 * integrated config and xlat table: the records in the table are
 513	 * indexed by the FP strap nibble in EXTDEV_BOOT, and each record has
 514	 * two bytes - the first as a config byte, the second for indexing the
 515	 * fp mode table pointed to by the BIT 'D' table
 516	 *
 517	 * DDC is not used until after card init, so selecting the correct table
 518	 * entry and setting the dual link flag for EDID equipped panels,
 519	 * requiring tests against the native-mode pixel clock, cannot be done
 520	 * until later, when this function should be called with non-zero pxclk
 521	 */
 522	struct nouveau_drm *drm = nouveau_drm(dev);
 523	struct nvbios *bios = &drm->vbios;
 524	int fpstrapping = get_fp_strap(dev, bios), lvdsmanufacturerindex = 0;
 525	struct lvdstableheader lth;
 526	uint16_t lvdsofs;
 527	int ret, chip_version = bios->chip_version;
 528
 529	ret = parse_lvds_manufacturer_table_header(dev, bios, &lth);
 530	if (ret)
 531		return ret;
 532
 533	switch (lth.lvds_ver) {
 534	case 0x0a:	/* pre NV40 */
 535		lvdsmanufacturerindex = bios->data[
 536					bios->fp.fpxlatemanufacturertableptr +
 537					fpstrapping];
 538
 539		/* we're done if this isn't the EDID panel case */
 540		if (!pxclk)
 541			break;
 542
 543		if (chip_version < 0x25) {
 544			/* nv17 behaviour
 545			 *
 546			 * It seems the old style lvds script pointer is reused
 547			 * to select 18/24 bit colour depth for EDID panels.
 548			 */
 549			lvdsmanufacturerindex =
 550				(bios->legacy.lvds_single_a_script_ptr & 1) ?
 551									2 : 0;
 552			if (pxclk >= bios->fp.duallink_transition_clk)
 553				lvdsmanufacturerindex++;
 554		} else if (chip_version < 0x30) {
 555			/* nv28 behaviour (off-chip encoder)
 556			 *
 557			 * nv28 does a complex dance of first using byte 121 of
 558			 * the EDID to choose the lvdsmanufacturerindex, then
 559			 * later attempting to match the EDID manufacturer and
 560			 * product IDs in a table (signature 'pidt' (panel id
 561			 * table?)), setting an lvdsmanufacturerindex of 0 and
 562			 * an fp strap of the match index (or 0xf if none)
 563			 */
 564			lvdsmanufacturerindex = 0;
 565		} else {
 566			/* nv31, nv34 behaviour */
 567			lvdsmanufacturerindex = 0;
 568			if (pxclk >= bios->fp.duallink_transition_clk)
 569				lvdsmanufacturerindex = 2;
 570			if (pxclk >= 140000)
 571				lvdsmanufacturerindex = 3;
 572		}
 573
 574		/*
 575		 * nvidia set the high nibble of (cr57=f, cr58) to
 576		 * lvdsmanufacturerindex in this case; we don't
 577		 */
 578		break;
 579	case 0x30:	/* NV4x */
 580	case 0x40:	/* G80/G90 */
 581		lvdsmanufacturerindex = fpstrapping;
 582		break;
 583	default:
 584		NV_ERROR(drm, "LVDS table revision not currently supported\n");
 585		return -ENOSYS;
 586	}
 587
 588	lvdsofs = bios->fp.xlated_entry = bios->fp.lvdsmanufacturerpointer + lth.headerlen + lth.recordlen * lvdsmanufacturerindex;
 589	switch (lth.lvds_ver) {
 590	case 0x0a:
 591		bios->fp.power_off_for_reset = bios->data[lvdsofs] & 1;
 592		bios->fp.reset_after_pclk_change = bios->data[lvdsofs] & 2;
 593		bios->fp.dual_link = bios->data[lvdsofs] & 4;
 594		bios->fp.link_c_increment = bios->data[lvdsofs] & 8;
 595		*if_is_24bit = bios->data[lvdsofs] & 16;
 596		break;
 597	case 0x30:
 598	case 0x40:
 599		/*
 600		 * No sign of the "power off for reset" or "reset for panel
 601		 * on" bits, but it's safer to assume we should
 602		 */
 603		bios->fp.power_off_for_reset = true;
 604		bios->fp.reset_after_pclk_change = true;
 605
 606		/*
 607		 * It's ok lvdsofs is wrong for nv4x edid case; dual_link is
 608		 * over-written, and if_is_24bit isn't used
 609		 */
 610		bios->fp.dual_link = bios->data[lvdsofs] & 1;
 611		bios->fp.if_is_24bit = bios->data[lvdsofs] & 2;
 612		bios->fp.strapless_is_24bit = bios->data[bios->fp.lvdsmanufacturerpointer + 4];
 613		bios->fp.duallink_transition_clk = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 5]) * 10;
 614		break;
 615	}
 616
 617	/* set dual_link flag for EDID case */
 618	if (pxclk && (chip_version < 0x25 || chip_version > 0x28))
 619		bios->fp.dual_link = (pxclk >= bios->fp.duallink_transition_clk);
 620
 621	*dl = bios->fp.dual_link;
 622
 623	return 0;
 624}
 625
 626int run_tmds_table(struct drm_device *dev, struct dcb_output *dcbent, int head, int pxclk)
 627{
 628	/*
 629	 * the pxclk parameter is in kHz
 630	 *
 631	 * This runs the TMDS regs setting code found on BIT bios cards
 632	 *
 633	 * For ffs(or) == 1 use the first table, for ffs(or) == 2 and
 634	 * ffs(or) == 3, use the second.
 635	 */
 636
 637	struct nouveau_drm *drm = nouveau_drm(dev);
 638	struct nvif_object *device = &drm->device.object;
 639	struct nvbios *bios = &drm->vbios;
 640	int cv = bios->chip_version;
 641	uint16_t clktable = 0, scriptptr;
 642	uint32_t sel_clk_binding, sel_clk;
 643
 644	/* pre-nv17 off-chip tmds uses scripts, post nv17 doesn't */
 645	if (cv >= 0x17 && cv != 0x1a && cv != 0x20 &&
 646	    dcbent->location != DCB_LOC_ON_CHIP)
 647		return 0;
 648
 649	switch (ffs(dcbent->or)) {
 650	case 1:
 651		clktable = bios->tmds.output0_script_ptr;
 652		break;
 653	case 2:
 654	case 3:
 655		clktable = bios->tmds.output1_script_ptr;
 656		break;
 657	}
 658
 659	if (!clktable) {
 660		NV_ERROR(drm, "Pixel clock comparison table not found\n");
 661		return -EINVAL;
 662	}
 663
 664	scriptptr = clkcmptable(bios, clktable, pxclk);
 665
 666	if (!scriptptr) {
 667		NV_ERROR(drm, "TMDS output init script not found\n");
 668		return -ENOENT;
 669	}
 670
 671	/* don't let script change pll->head binding */
 672	sel_clk_binding = nvif_rd32(device, NV_PRAMDAC_SEL_CLK) & 0x50000;
 673	run_digital_op_script(dev, scriptptr, dcbent, head, pxclk >= 165000);
 674	sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK) & ~0x50000;
 675	NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, sel_clk | sel_clk_binding);
 676
 677	return 0;
 678}
 679
 680static void parse_script_table_pointers(struct nvbios *bios, uint16_t offset)
 681{
 682	/*
 683	 * Parses the init table segment for pointers used in script execution.
 684	 *
 685	 * offset + 0  (16 bits): init script tables pointer
 686	 * offset + 2  (16 bits): macro index table pointer
 687	 * offset + 4  (16 bits): macro table pointer
 688	 * offset + 6  (16 bits): condition table pointer
 689	 * offset + 8  (16 bits): io condition table pointer
 690	 * offset + 10 (16 bits): io flag condition table pointer
 691	 * offset + 12 (16 bits): init function table pointer
 692	 */
 693
 694	bios->init_script_tbls_ptr = ROM16(bios->data[offset]);
 695}
 696
 697static int parse_bit_A_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 698{
 699	/*
 700	 * Parses the load detect values for g80 cards.
 701	 *
 702	 * offset + 0 (16 bits): loadval table pointer
 703	 */
 704
 705	struct nouveau_drm *drm = nouveau_drm(dev);
 706	uint16_t load_table_ptr;
 707	uint8_t version, headerlen, entrylen, num_entries;
 708
 709	if (bitentry->length != 3) {
 710		NV_ERROR(drm, "Do not understand BIT A table\n");
 711		return -EINVAL;
 712	}
 713
 714	load_table_ptr = ROM16(bios->data[bitentry->offset]);
 715
 716	if (load_table_ptr == 0x0) {
 717		NV_DEBUG(drm, "Pointer to BIT loadval table invalid\n");
 718		return -EINVAL;
 719	}
 720
 721	version = bios->data[load_table_ptr];
 722
 723	if (version != 0x10) {
 724		NV_ERROR(drm, "BIT loadval table version %d.%d not supported\n",
 725			 version >> 4, version & 0xF);
 726		return -ENOSYS;
 727	}
 728
 729	headerlen = bios->data[load_table_ptr + 1];
 730	entrylen = bios->data[load_table_ptr + 2];
 731	num_entries = bios->data[load_table_ptr + 3];
 732
 733	if (headerlen != 4 || entrylen != 4 || num_entries != 2) {
 734		NV_ERROR(drm, "Do not understand BIT loadval table\n");
 735		return -EINVAL;
 736	}
 737
 738	/* First entry is normal dac, 2nd tv-out perhaps? */
 739	bios->dactestval = ROM32(bios->data[load_table_ptr + headerlen]) & 0x3ff;
 740
 741	return 0;
 742}
 743
 744static int parse_bit_display_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 745{
 746	/*
 747	 * Parses the flat panel table segment that the bit entry points to.
 748	 * Starting at bitentry->offset:
 749	 *
 750	 * offset + 0  (16 bits): ??? table pointer - seems to have 18 byte
 751	 * records beginning with a freq.
 752	 * offset + 2  (16 bits): mode table pointer
 753	 */
 754	struct nouveau_drm *drm = nouveau_drm(dev);
 755
 756	if (bitentry->length != 4) {
 757		NV_ERROR(drm, "Do not understand BIT display table\n");
 758		return -EINVAL;
 759	}
 760
 761	bios->fp.fptablepointer = ROM16(bios->data[bitentry->offset + 2]);
 762
 763	return 0;
 764}
 765
 766static int parse_bit_init_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 767{
 768	/*
 769	 * Parses the init table segment that the bit entry points to.
 770	 *
 771	 * See parse_script_table_pointers for layout
 772	 */
 773	struct nouveau_drm *drm = nouveau_drm(dev);
 774
 775	if (bitentry->length < 14) {
 776		NV_ERROR(drm, "Do not understand init table\n");
 777		return -EINVAL;
 778	}
 779
 780	parse_script_table_pointers(bios, bitentry->offset);
 781	return 0;
 782}
 783
 784static int parse_bit_i_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 785{
 786	/*
 787	 * BIT 'i' (info?) table
 788	 *
 789	 * offset + 0  (32 bits): BIOS version dword (as in B table)
 790	 * offset + 5  (8  bits): BIOS feature byte (same as for BMP?)
 791	 * offset + 13 (16 bits): pointer to table containing DAC load
 792	 * detection comparison values
 793	 *
 794	 * There's other things in the table, purpose unknown
 795	 */
 796
 797	struct nouveau_drm *drm = nouveau_drm(dev);
 798	uint16_t daccmpoffset;
 799	uint8_t dacver, dacheaderlen;
 800
 801	if (bitentry->length < 6) {
 802		NV_ERROR(drm, "BIT i table too short for needed information\n");
 803		return -EINVAL;
 804	}
 805
 806	/*
 807	 * bit 4 seems to indicate a mobile bios (doesn't suffer from BMP's
 808	 * Quadro identity crisis), other bits possibly as for BMP feature byte
 809	 */
 810	bios->feature_byte = bios->data[bitentry->offset + 5];
 811	bios->is_mobile = bios->feature_byte & FEATURE_MOBILE;
 812
 813	if (bitentry->length < 15) {
 814		NV_WARN(drm, "BIT i table not long enough for DAC load "
 815			       "detection comparison table\n");
 816		return -EINVAL;
 817	}
 818
 819	daccmpoffset = ROM16(bios->data[bitentry->offset + 13]);
 820
 821	/* doesn't exist on g80 */
 822	if (!daccmpoffset)
 823		return 0;
 824
 825	/*
 826	 * The first value in the table, following the header, is the
 827	 * comparison value, the second entry is a comparison value for
 828	 * TV load detection.
 829	 */
 830
 831	dacver = bios->data[daccmpoffset];
 832	dacheaderlen = bios->data[daccmpoffset + 1];
 833
 834	if (dacver != 0x00 && dacver != 0x10) {
 835		NV_WARN(drm, "DAC load detection comparison table version "
 836			       "%d.%d not known\n", dacver >> 4, dacver & 0xf);
 837		return -ENOSYS;
 838	}
 839
 840	bios->dactestval = ROM32(bios->data[daccmpoffset + dacheaderlen]);
 841	bios->tvdactestval = ROM32(bios->data[daccmpoffset + dacheaderlen + 4]);
 842
 843	return 0;
 844}
 845
 846static int parse_bit_lvds_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 847{
 848	/*
 849	 * Parses the LVDS table segment that the bit entry points to.
 850	 * Starting at bitentry->offset:
 851	 *
 852	 * offset + 0  (16 bits): LVDS strap xlate table pointer
 853	 */
 854
 855	struct nouveau_drm *drm = nouveau_drm(dev);
 856
 857	if (bitentry->length != 2) {
 858		NV_ERROR(drm, "Do not understand BIT LVDS table\n");
 859		return -EINVAL;
 860	}
 861
 862	/*
 863	 * No idea if it's still called the LVDS manufacturer table, but
 864	 * the concept's close enough.
 865	 */
 866	bios->fp.lvdsmanufacturerpointer = ROM16(bios->data[bitentry->offset]);
 867
 868	return 0;
 869}
 870
 871static int
 872parse_bit_M_tbl_entry(struct drm_device *dev, struct nvbios *bios,
 873		      struct bit_entry *bitentry)
 874{
 875	/*
 876	 * offset + 2  (8  bits): number of options in an
 877	 * 	INIT_RAM_RESTRICT_ZM_REG_GROUP opcode option set
 878	 * offset + 3  (16 bits): pointer to strap xlate table for RAM
 879	 * 	restrict option selection
 880	 *
 881	 * There's a bunch of bits in this table other than the RAM restrict
 882	 * stuff that we don't use - their use currently unknown
 883	 */
 884
 885	/*
 886	 * Older bios versions don't have a sufficiently long table for
 887	 * what we want
 888	 */
 889	if (bitentry->length < 0x5)
 890		return 0;
 891
 892	if (bitentry->version < 2) {
 893		bios->ram_restrict_group_count = bios->data[bitentry->offset + 2];
 894		bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 3]);
 895	} else {
 896		bios->ram_restrict_group_count = bios->data[bitentry->offset + 0];
 897		bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 1]);
 898	}
 899
 900	return 0;
 901}
 902
 903static int parse_bit_tmds_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 904{
 905	/*
 906	 * Parses the pointer to the TMDS table
 907	 *
 908	 * Starting at bitentry->offset:
 909	 *
 910	 * offset + 0  (16 bits): TMDS table pointer
 911	 *
 912	 * The TMDS table is typically found just before the DCB table, with a
 913	 * characteristic signature of 0x11,0x13 (1.1 being version, 0x13 being
 914	 * length?)
 915	 *
 916	 * At offset +7 is a pointer to a script, which I don't know how to
 917	 * run yet.
 918	 * At offset +9 is a pointer to another script, likewise
 919	 * Offset +11 has a pointer to a table where the first word is a pxclk
 920	 * frequency and the second word a pointer to a script, which should be
 921	 * run if the comparison pxclk frequency is less than the pxclk desired.
 922	 * This repeats for decreasing comparison frequencies
 923	 * Offset +13 has a pointer to a similar table
 924	 * The selection of table (and possibly +7/+9 script) is dictated by
 925	 * "or" from the DCB.
 926	 */
 927
 928	struct nouveau_drm *drm = nouveau_drm(dev);
 929	uint16_t tmdstableptr, script1, script2;
 930
 931	if (bitentry->length != 2) {
 932		NV_ERROR(drm, "Do not understand BIT TMDS table\n");
 933		return -EINVAL;
 934	}
 935
 936	tmdstableptr = ROM16(bios->data[bitentry->offset]);
 937	if (!tmdstableptr) {
 938		NV_ERROR(drm, "Pointer to TMDS table invalid\n");
 939		return -EINVAL;
 940	}
 941
 942	NV_INFO(drm, "TMDS table version %d.%d\n",
 943		bios->data[tmdstableptr] >> 4, bios->data[tmdstableptr] & 0xf);
 944
 945	/* nv50+ has v2.0, but we don't parse it atm */
 946	if (bios->data[tmdstableptr] != 0x11)
 947		return -ENOSYS;
 948
 949	/*
 950	 * These two scripts are odd: they don't seem to get run even when
 951	 * they are not stubbed.
 952	 */
 953	script1 = ROM16(bios->data[tmdstableptr + 7]);
 954	script2 = ROM16(bios->data[tmdstableptr + 9]);
 955	if (bios->data[script1] != 'q' || bios->data[script2] != 'q')
 956		NV_WARN(drm, "TMDS table script pointers not stubbed\n");
 957
 958	bios->tmds.output0_script_ptr = ROM16(bios->data[tmdstableptr + 11]);
 959	bios->tmds.output1_script_ptr = ROM16(bios->data[tmdstableptr + 13]);
 960
 961	return 0;
 962}
 963
 964struct bit_table {
 965	const char id;
 966	int (* const parse_fn)(struct drm_device *, struct nvbios *, struct bit_entry *);
 967};
 968
 969#define BIT_TABLE(id, funcid) ((struct bit_table){ id, parse_bit_##funcid##_tbl_entry })
 970
 971int
 972bit_table(struct drm_device *dev, u8 id, struct bit_entry *bit)
 973{
 974	struct nouveau_drm *drm = nouveau_drm(dev);
 975	struct nvbios *bios = &drm->vbios;
 976	u8 entries, *entry;
 977
 978	if (bios->type != NVBIOS_BIT)
 979		return -ENODEV;
 980
 981	entries = bios->data[bios->offset + 10];
 982	entry   = &bios->data[bios->offset + 12];
 983	while (entries--) {
 984		if (entry[0] == id) {
 985			bit->id = entry[0];
 986			bit->version = entry[1];
 987			bit->length = ROM16(entry[2]);
 988			bit->offset = ROM16(entry[4]);
 989			bit->data = ROMPTR(dev, entry[4]);
 990			return 0;
 991		}
 992
 993		entry += bios->data[bios->offset + 9];
 994	}
 995
 996	return -ENOENT;
 997}
 998
 999static int
1000parse_bit_table(struct nvbios *bios, const uint16_t bitoffset,
1001		struct bit_table *table)
1002{
1003	struct drm_device *dev = bios->dev;
1004	struct nouveau_drm *drm = nouveau_drm(dev);
1005	struct bit_entry bitentry;
1006
1007	if (bit_table(dev, table->id, &bitentry) == 0)
1008		return table->parse_fn(dev, bios, &bitentry);
1009
1010	NV_INFO(drm, "BIT table '%c' not found\n", table->id);
1011	return -ENOSYS;
1012}
1013
1014static int
1015parse_bit_structure(struct nvbios *bios, const uint16_t bitoffset)
1016{
1017	int ret;
1018
1019	/*
1020	 * The only restriction on parsing order currently is having 'i' first
1021	 * for use of bios->*_version or bios->feature_byte while parsing;
1022	 * functions shouldn't be actually *doing* anything apart from pulling
1023	 * data from the image into the bios struct, thus no interdependencies
1024	 */
1025	ret = parse_bit_table(bios, bitoffset, &BIT_TABLE('i', i));
1026	if (ret) /* info? */
1027		return ret;
1028	if (bios->major_version >= 0x60) /* g80+ */
1029		parse_bit_table(bios, bitoffset, &BIT_TABLE('A', A));
1030	parse_bit_table(bios, bitoffset, &BIT_TABLE('D', display));
1031	ret = parse_bit_table(bios, bitoffset, &BIT_TABLE('I', init));
1032	if (ret)
1033		return ret;
1034	parse_bit_table(bios, bitoffset, &BIT_TABLE('M', M)); /* memory? */
1035	parse_bit_table(bios, bitoffset, &BIT_TABLE('L', lvds));
1036	parse_bit_table(bios, bitoffset, &BIT_TABLE('T', tmds));
1037
1038	return 0;
1039}
1040
1041static int parse_bmp_structure(struct drm_device *dev, struct nvbios *bios, unsigned int offset)
1042{
1043	/*
1044	 * Parses the BMP structure for useful things, but does not act on them
1045	 *
1046	 * offset +   5: BMP major version
1047	 * offset +   6: BMP minor version
1048	 * offset +   9: BMP feature byte
1049	 * offset +  10: BCD encoded BIOS version
1050	 *
1051	 * offset +  18: init script table pointer (for bios versions < 5.10h)
1052	 * offset +  20: extra init script table pointer (for bios
1053	 * versions < 5.10h)
1054	 *
1055	 * offset +  24: memory init table pointer (used on early bios versions)
1056	 * offset +  26: SDR memory sequencing setup data table
1057	 * offset +  28: DDR memory sequencing setup data table
1058	 *
1059	 * offset +  54: index of I2C CRTC pair to use for CRT output
1060	 * offset +  55: index of I2C CRTC pair to use for TV output
1061	 * offset +  56: index of I2C CRTC pair to use for flat panel output
1062	 * offset +  58: write CRTC index for I2C pair 0
1063	 * offset +  59: read CRTC index for I2C pair 0
1064	 * offset +  60: write CRTC index for I2C pair 1
1065	 * offset +  61: read CRTC index for I2C pair 1
1066	 *
1067	 * offset +  67: maximum internal PLL frequency (single stage PLL)
1068	 * offset +  71: minimum internal PLL frequency (single stage PLL)
1069	 *
1070	 * offset +  75: script table pointers, as described in
1071	 * parse_script_table_pointers
1072	 *
1073	 * offset +  89: TMDS single link output A table pointer
1074	 * offset +  91: TMDS single link output B table pointer
1075	 * offset +  95: LVDS single link output A table pointer
1076	 * offset + 105: flat panel timings table pointer
1077	 * offset + 107: flat panel strapping translation table pointer
1078	 * offset + 117: LVDS manufacturer panel config table pointer
1079	 * offset + 119: LVDS manufacturer strapping translation table pointer
1080	 *
1081	 * offset + 142: PLL limits table pointer
1082	 *
1083	 * offset + 156: minimum pixel clock for LVDS dual link
1084	 */
1085
1086	struct nouveau_drm *drm = nouveau_drm(dev);
1087	uint8_t *bmp = &bios->data[offset], bmp_version_major, bmp_version_minor;
1088	uint16_t bmplength;
1089	uint16_t legacy_scripts_offset, legacy_i2c_offset;
1090
1091	/* load needed defaults in case we can't parse this info */
1092	bios->digital_min_front_porch = 0x4b;
1093	bios->fmaxvco = 256000;
1094	bios->fminvco = 128000;
1095	bios->fp.duallink_transition_clk = 90000;
1096
1097	bmp_version_major = bmp[5];
1098	bmp_version_minor = bmp[6];
1099
1100	NV_INFO(drm, "BMP version %d.%d\n",
1101		 bmp_version_major, bmp_version_minor);
1102
1103	/*
1104	 * Make sure that 0x36 is blank and can't be mistaken for a DCB
1105	 * pointer on early versions
1106	 */
1107	if (bmp_version_major < 5)
1108		*(uint16_t *)&bios->data[0x36] = 0;
1109
1110	/*
1111	 * Seems that the minor version was 1 for all major versions prior
1112	 * to 5. Version 6 could theoretically exist, but I suspect BIT
1113	 * happened instead.
1114	 */
1115	if ((bmp_version_major < 5 && bmp_version_minor != 1) || bmp_version_major > 5) {
1116		NV_ERROR(drm, "You have an unsupported BMP version. "
1117				"Please send in your bios\n");
1118		return -ENOSYS;
1119	}
1120
1121	if (bmp_version_major == 0)
1122		/* nothing that's currently useful in this version */
1123		return 0;
1124	else if (bmp_version_major == 1)
1125		bmplength = 44; /* exact for 1.01 */
1126	else if (bmp_version_major == 2)
1127		bmplength = 48; /* exact for 2.01 */
1128	else if (bmp_version_major == 3)
1129		bmplength = 54;
1130		/* guessed - mem init tables added in this version */
1131	else if (bmp_version_major == 4 || bmp_version_minor < 0x1)
1132		/* don't know if 5.0 exists... */
1133		bmplength = 62;
1134		/* guessed - BMP I2C indices added in version 4*/
1135	else if (bmp_version_minor < 0x6)
1136		bmplength = 67; /* exact for 5.01 */
1137	else if (bmp_version_minor < 0x10)
1138		bmplength = 75; /* exact for 5.06 */
1139	else if (bmp_version_minor == 0x10)
1140		bmplength = 89; /* exact for 5.10h */
1141	else if (bmp_version_minor < 0x14)
1142		bmplength = 118; /* exact for 5.11h */
1143	else if (bmp_version_minor < 0x24)
1144		/*
1145		 * Not sure of version where pll limits came in;
1146		 * certainly exist by 0x24 though.
1147		 */
1148		/* length not exact: this is long enough to get lvds members */
1149		bmplength = 123;
1150	else if (bmp_version_minor < 0x27)
1151		/*
1152		 * Length not exact: this is long enough to get pll limit
1153		 * member
1154		 */
1155		bmplength = 144;
1156	else
1157		/*
1158		 * Length not exact: this is long enough to get dual link
1159		 * transition clock.
1160		 */
1161		bmplength = 158;
1162
1163	/* checksum */
1164	if (nv_cksum(bmp, 8)) {
1165		NV_ERROR(drm, "Bad BMP checksum\n");
1166		return -EINVAL;
1167	}
1168
1169	/*
1170	 * Bit 4 seems to indicate either a mobile bios or a quadro card --
1171	 * mobile behaviour consistent (nv11+), quadro only seen nv18gl-nv36gl
1172	 * (not nv10gl), bit 5 that the flat panel tables are present, and
1173	 * bit 6 a tv bios.
1174	 */
1175	bios->feature_byte = bmp[9];
1176
1177	if (bmp_version_major < 5 || bmp_version_minor < 0x10)
1178		bios->old_style_init = true;
1179	legacy_scripts_offset = 18;
1180	if (bmp_version_major < 2)
1181		legacy_scripts_offset -= 4;
1182	bios->init_script_tbls_ptr = ROM16(bmp[legacy_scripts_offset]);
1183	bios->extra_init_script_tbl_ptr = ROM16(bmp[legacy_scripts_offset + 2]);
1184
1185	if (bmp_version_major > 2) {	/* appears in BMP 3 */
1186		bios->legacy.mem_init_tbl_ptr = ROM16(bmp[24]);
1187		bios->legacy.sdr_seq_tbl_ptr = ROM16(bmp[26]);
1188		bios->legacy.ddr_seq_tbl_ptr = ROM16(bmp[28]);
1189	}
1190
1191	legacy_i2c_offset = 0x48;	/* BMP version 2 & 3 */
1192	if (bmplength > 61)
1193		legacy_i2c_offset = offset + 54;
1194	bios->legacy.i2c_indices.crt = bios->data[legacy_i2c_offset];
1195	bios->legacy.i2c_indices.tv = bios->data[legacy_i2c_offset + 1];
1196	bios->legacy.i2c_indices.panel = bios->data[legacy_i2c_offset + 2];
1197
1198	if (bmplength > 74) {
1199		bios->fmaxvco = ROM32(bmp[67]);
1200		bios->fminvco = ROM32(bmp[71]);
1201	}
1202	if (bmplength > 88)
1203		parse_script_table_pointers(bios, offset + 75);
1204	if (bmplength > 94) {
1205		bios->tmds.output0_script_ptr = ROM16(bmp[89]);
1206		bios->tmds.output1_script_ptr = ROM16(bmp[91]);
1207		/*
1208		 * Never observed in use with lvds scripts, but is reused for
1209		 * 18/24 bit panel interface default for EDID equipped panels
1210		 * (if_is_24bit not set directly to avoid any oscillation).
1211		 */
1212		bios->legacy.lvds_single_a_script_ptr = ROM16(bmp[95]);
1213	}
1214	if (bmplength > 108) {
1215		bios->fp.fptablepointer = ROM16(bmp[105]);
1216		bios->fp.fpxlatetableptr = ROM16(bmp[107]);
1217		bios->fp.xlatwidth = 1;
1218	}
1219	if (bmplength > 120) {
1220		bios->fp.lvdsmanufacturerpointer = ROM16(bmp[117]);
1221		bios->fp.fpxlatemanufacturertableptr = ROM16(bmp[119]);
1222	}
1223#if 0
1224	if (bmplength > 143)
1225		bios->pll_limit_tbl_ptr = ROM16(bmp[142]);
1226#endif
1227
1228	if (bmplength > 157)
1229		bios->fp.duallink_transition_clk = ROM16(bmp[156]) * 10;
1230
1231	return 0;
1232}
1233
1234static uint16_t findstr(uint8_t *data, int n, const uint8_t *str, int len)
1235{
1236	int i, j;
1237
1238	for (i = 0; i <= (n - len); i++) {
1239		for (j = 0; j < len; j++)
1240			if (data[i + j] != str[j])
1241				break;
1242		if (j == len)
1243			return i;
1244	}
1245
1246	return 0;
1247}
1248
1249void *
1250olddcb_table(struct drm_device *dev)
1251{
1252	struct nouveau_drm *drm = nouveau_drm(dev);
1253	u8 *dcb = NULL;
1254
1255	if (drm->device.info.family > NV_DEVICE_INFO_V0_TNT)
1256		dcb = ROMPTR(dev, drm->vbios.data[0x36]);
1257	if (!dcb) {
1258		NV_WARN(drm, "No DCB data found in VBIOS\n");
1259		return NULL;
1260	}
1261
1262	if (dcb[0] >= 0x42) {
1263		NV_WARN(drm, "DCB version 0x%02x unknown\n", dcb[0]);
1264		return NULL;
1265	} else
1266	if (dcb[0] >= 0x30) {
1267		if (ROM32(dcb[6]) == 0x4edcbdcb)
1268			return dcb;
1269	} else
1270	if (dcb[0] >= 0x20) {
1271		if (ROM32(dcb[4]) == 0x4edcbdcb)
1272			return dcb;
1273	} else
1274	if (dcb[0] >= 0x15) {
1275		if (!memcmp(&dcb[-7], "DEV_REC", 7))
1276			return dcb;
1277	} else {
1278		/*
1279		 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but
1280		 * always has the same single (crt) entry, even when tv-out
1281		 * present, so the conclusion is this version cannot really
1282		 * be used.
1283		 *
1284		 * v1.2 tables (some NV6/10, and NV15+) normally have the
1285		 * same 5 entries, which are not specific to the card and so
1286		 * no use.
1287		 *
1288		 * v1.2 does have an I2C table that read_dcb_i2c_table can
1289		 * handle, but cards exist (nv11 in #14821) with a bad i2c
1290		 * table pointer, so use the indices parsed in
1291		 * parse_bmp_structure.
1292		 *
1293		 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful
1294		 */
1295		NV_WARN(drm, "No useful DCB data in VBIOS\n");
1296		return NULL;
1297	}
1298
1299	NV_WARN(drm, "DCB header validation failed\n");
1300	return NULL;
1301}
1302
1303void *
1304olddcb_outp(struct drm_device *dev, u8 idx)
1305{
1306	u8 *dcb = olddcb_table(dev);
1307	if (dcb && dcb[0] >= 0x30) {
1308		if (idx < dcb[2])
1309			return dcb + dcb[1] + (idx * dcb[3]);
1310	} else
1311	if (dcb && dcb[0] >= 0x20) {
1312		u8 *i2c = ROMPTR(dev, dcb[2]);
1313		u8 *ent = dcb + 8 + (idx * 8);
1314		if (i2c && ent < i2c)
1315			return ent;
1316	} else
1317	if (dcb && dcb[0] >= 0x15) {
1318		u8 *i2c = ROMPTR(dev, dcb[2]);
1319		u8 *ent = dcb + 4 + (idx * 10);
1320		if (i2c && ent < i2c)
1321			return ent;
1322	}
1323
1324	return NULL;
1325}
1326
1327int
1328olddcb_outp_foreach(struct drm_device *dev, void *data,
1329		 int (*exec)(struct drm_device *, void *, int idx, u8 *outp))
1330{
1331	int ret, idx = -1;
1332	u8 *outp = NULL;
1333	while ((outp = olddcb_outp(dev, ++idx))) {
1334		if (ROM32(outp[0]) == 0x00000000)
1335			break; /* seen on an NV11 with DCB v1.5 */
1336		if (ROM32(outp[0]) == 0xffffffff)
1337			break; /* seen on an NV17 with DCB v2.0 */
1338
1339		if ((outp[0] & 0x0f) == DCB_OUTPUT_UNUSED)
1340			continue;
1341		if ((outp[0] & 0x0f) == DCB_OUTPUT_EOL)
1342			break;
1343
1344		ret = exec(dev, data, idx, outp);
1345		if (ret)
1346			return ret;
1347	}
1348
1349	return 0;
1350}
1351
1352u8 *
1353olddcb_conntab(struct drm_device *dev)
1354{
1355	u8 *dcb = olddcb_table(dev);
1356	if (dcb && dcb[0] >= 0x30 && dcb[1] >= 0x16) {
1357		u8 *conntab = ROMPTR(dev, dcb[0x14]);
1358		if (conntab && conntab[0] >= 0x30 && conntab[0] <= 0x40)
1359			return conntab;
1360	}
1361	return NULL;
1362}
1363
1364u8 *
1365olddcb_conn(struct drm_device *dev, u8 idx)
1366{
1367	u8 *conntab = olddcb_conntab(dev);
1368	if (conntab && idx < conntab[2])
1369		return conntab + conntab[1] + (idx * conntab[3]);
1370	return NULL;
1371}
1372
1373static struct dcb_output *new_dcb_entry(struct dcb_table *dcb)
1374{
1375	struct dcb_output *entry = &dcb->entry[dcb->entries];
1376
1377	memset(entry, 0, sizeof(struct dcb_output));
1378	entry->index = dcb->entries++;
1379
1380	return entry;
1381}
1382
1383static void fabricate_dcb_output(struct dcb_table *dcb, int type, int i2c,
1384				 int heads, int or)
1385{
1386	struct dcb_output *entry = new_dcb_entry(dcb);
1387
1388	entry->type = type;
1389	entry->i2c_index = i2c;
1390	entry->heads = heads;
1391	if (type != DCB_OUTPUT_ANALOG)
1392		entry->location = !DCB_LOC_ON_CHIP; /* ie OFF CHIP */
1393	entry->or = or;
1394}
1395
1396static bool
1397parse_dcb20_entry(struct drm_device *dev, struct dcb_table *dcb,
1398		  uint32_t conn, uint32_t conf, struct dcb_output *entry)
1399{
1400	struct nouveau_drm *drm = nouveau_drm(dev);
1401	int link = 0;
1402
1403	entry->type = conn & 0xf;
1404	entry->i2c_index = (conn >> 4) & 0xf;
1405	entry->heads = (conn >> 8) & 0xf;
1406	entry->connector = (conn >> 12) & 0xf;
1407	entry->bus = (conn >> 16) & 0xf;
1408	entry->location = (conn >> 20) & 0x3;
1409	entry->or = (conn >> 24) & 0xf;
1410
1411	switch (entry->type) {
1412	case DCB_OUTPUT_ANALOG:
1413		/*
1414		 * Although the rest of a CRT conf dword is usually
1415		 * zeros, mac biosen have stuff there so we must mask
1416		 */
1417		entry->crtconf.maxfreq = (dcb->version < 0x30) ?
1418					 (conf & 0xffff) * 10 :
1419					 (conf & 0xff) * 10000;
1420		break;
1421	case DCB_OUTPUT_LVDS:
1422		{
1423		uint32_t mask;
1424		if (conf & 0x1)
1425			entry->lvdsconf.use_straps_for_mode = true;
1426		if (dcb->version < 0x22) {
1427			mask = ~0xd;
1428			/*
1429			 * The laptop in bug 14567 lies and claims to not use
1430			 * straps when it does, so assume all DCB 2.0 laptops
1431			 * use straps, until a broken EDID using one is produced
1432			 */
1433			entry->lvdsconf.use_straps_for_mode = true;
1434			/*
1435			 * Both 0x4 and 0x8 show up in v2.0 tables; assume they
1436			 * mean the same thing (probably wrong, but might work)
1437			 */
1438			if (conf & 0x4 || conf & 0x8)
1439				entry->lvdsconf.use_power_scripts = true;
1440		} else {
1441			mask = ~0x7;
1442			if (conf & 0x2)
1443				entry->lvdsconf.use_acpi_for_edid = true;
1444			if (conf & 0x4)
1445				entry->lvdsconf.use_power_scripts = true;
1446			entry->lvdsconf.sor.link = (conf & 0x00000030) >> 4;
1447			link = entry->lvdsconf.sor.link;
1448		}
1449		if (conf & mask) {
1450			/*
1451			 * Until we even try to use these on G8x, it's
1452			 * useless reporting unknown bits.  They all are.
1453			 */
1454			if (dcb->version >= 0x40)
1455				break;
1456
1457			NV_ERROR(drm, "Unknown LVDS configuration bits, "
1458				      "please report\n");
1459		}
1460		break;
1461		}
1462	case DCB_OUTPUT_TV:
1463	{
1464		if (dcb->version >= 0x30)
1465			entry->tvconf.has_component_output = conf & (0x8 << 4);
1466		else
1467			entry->tvconf.has_component_output = false;
1468
1469		break;
1470	}
1471	case DCB_OUTPUT_DP:
1472		entry->dpconf.sor.link = (conf & 0x00000030) >> 4;
1473		entry->extdev = (conf & 0x0000ff00) >> 8;
1474		switch ((conf & 0x00e00000) >> 21) {
1475		case 0:
1476			entry->dpconf.link_bw = 162000;
1477			break;
1478		case 1:
1479			entry->dpconf.link_bw = 270000;
1480			break;
1481		default:
1482			entry->dpconf.link_bw = 540000;
1483			break;
 
 
 
 
1484		}
1485		switch ((conf & 0x0f000000) >> 24) {
1486		case 0xf:
1487		case 0x4:
1488			entry->dpconf.link_nr = 4;
1489			break;
1490		case 0x3:
1491		case 0x2:
1492			entry->dpconf.link_nr = 2;
1493			break;
1494		default:
1495			entry->dpconf.link_nr = 1;
1496			break;
1497		}
1498		link = entry->dpconf.sor.link;
1499		break;
1500	case DCB_OUTPUT_TMDS:
1501		if (dcb->version >= 0x40) {
1502			entry->tmdsconf.sor.link = (conf & 0x00000030) >> 4;
1503			entry->extdev = (conf & 0x0000ff00) >> 8;
1504			link = entry->tmdsconf.sor.link;
1505		}
1506		else if (dcb->version >= 0x30)
1507			entry->tmdsconf.slave_addr = (conf & 0x00000700) >> 8;
1508		else if (dcb->version >= 0x22)
1509			entry->tmdsconf.slave_addr = (conf & 0x00000070) >> 4;
1510		break;
1511	case DCB_OUTPUT_EOL:
1512		/* weird g80 mobile type that "nv" treats as a terminator */
1513		dcb->entries--;
1514		return false;
1515	default:
1516		break;
1517	}
1518
1519	if (dcb->version < 0x40) {
1520		/* Normal entries consist of a single bit, but dual link has
1521		 * the next most significant bit set too
1522		 */
1523		entry->duallink_possible =
1524			((1 << (ffs(entry->or) - 1)) * 3 == entry->or);
1525	} else {
1526		entry->duallink_possible = (entry->sorconf.link == 3);
1527	}
1528
1529	/* unsure what DCB version introduces this, 3.0? */
1530	if (conf & 0x100000)
1531		entry->i2c_upper_default = true;
1532
1533	entry->hasht = (entry->location << 4) | entry->type;
 
1534	entry->hashm = (entry->heads << 8) | (link << 6) | entry->or;
1535	return true;
1536}
1537
1538static bool
1539parse_dcb15_entry(struct drm_device *dev, struct dcb_table *dcb,
1540		  uint32_t conn, uint32_t conf, struct dcb_output *entry)
1541{
1542	struct nouveau_drm *drm = nouveau_drm(dev);
1543
1544	switch (conn & 0x0000000f) {
1545	case 0:
1546		entry->type = DCB_OUTPUT_ANALOG;
1547		break;
1548	case 1:
1549		entry->type = DCB_OUTPUT_TV;
1550		break;
1551	case 2:
1552	case 4:
1553		if (conn & 0x10)
1554			entry->type = DCB_OUTPUT_LVDS;
1555		else
1556			entry->type = DCB_OUTPUT_TMDS;
1557		break;
1558	case 3:
1559		entry->type = DCB_OUTPUT_LVDS;
1560		break;
1561	default:
1562		NV_ERROR(drm, "Unknown DCB type %d\n", conn & 0x0000000f);
1563		return false;
1564	}
1565
1566	entry->i2c_index = (conn & 0x0003c000) >> 14;
1567	entry->heads = ((conn & 0x001c0000) >> 18) + 1;
1568	entry->or = entry->heads; /* same as heads, hopefully safe enough */
1569	entry->location = (conn & 0x01e00000) >> 21;
1570	entry->bus = (conn & 0x0e000000) >> 25;
1571	entry->duallink_possible = false;
1572
1573	switch (entry->type) {
1574	case DCB_OUTPUT_ANALOG:
1575		entry->crtconf.maxfreq = (conf & 0xffff) * 10;
1576		break;
1577	case DCB_OUTPUT_TV:
1578		entry->tvconf.has_component_output = false;
1579		break;
1580	case DCB_OUTPUT_LVDS:
1581		if ((conn & 0x00003f00) >> 8 != 0x10)
1582			entry->lvdsconf.use_straps_for_mode = true;
1583		entry->lvdsconf.use_power_scripts = true;
1584		break;
1585	default:
1586		break;
1587	}
1588
1589	return true;
1590}
1591
1592static
1593void merge_like_dcb_entries(struct drm_device *dev, struct dcb_table *dcb)
1594{
1595	/*
1596	 * DCB v2.0 lists each output combination separately.
1597	 * Here we merge compatible entries to have fewer outputs, with
1598	 * more options
1599	 */
1600
1601	struct nouveau_drm *drm = nouveau_drm(dev);
1602	int i, newentries = 0;
1603
1604	for (i = 0; i < dcb->entries; i++) {
1605		struct dcb_output *ient = &dcb->entry[i];
1606		int j;
1607
1608		for (j = i + 1; j < dcb->entries; j++) {
1609			struct dcb_output *jent = &dcb->entry[j];
1610
1611			if (jent->type == 100) /* already merged entry */
1612				continue;
1613
1614			/* merge heads field when all other fields the same */
1615			if (jent->i2c_index == ient->i2c_index &&
1616			    jent->type == ient->type &&
1617			    jent->location == ient->location &&
1618			    jent->or == ient->or) {
1619				NV_INFO(drm, "Merging DCB entries %d and %d\n",
1620					 i, j);
1621				ient->heads |= jent->heads;
1622				jent->type = 100; /* dummy value */
1623			}
1624		}
1625	}
1626
1627	/* Compact entries merged into others out of dcb */
1628	for (i = 0; i < dcb->entries; i++) {
1629		if (dcb->entry[i].type == 100)
1630			continue;
1631
1632		if (newentries != i) {
1633			dcb->entry[newentries] = dcb->entry[i];
1634			dcb->entry[newentries].index = newentries;
1635		}
1636		newentries++;
1637	}
1638
1639	dcb->entries = newentries;
1640}
1641
1642static bool
1643apply_dcb_encoder_quirks(struct drm_device *dev, int idx, u32 *conn, u32 *conf)
1644{
1645	struct nouveau_drm *drm = nouveau_drm(dev);
1646	struct dcb_table *dcb = &drm->vbios.dcb;
1647
1648	/* Dell Precision M6300
1649	 *   DCB entry 2: 02025312 00000010
1650	 *   DCB entry 3: 02026312 00000020
1651	 *
1652	 * Identical, except apparently a different connector on a
1653	 * different SOR link.  Not a clue how we're supposed to know
1654	 * which one is in use if it even shares an i2c line...
1655	 *
1656	 * Ignore the connector on the second SOR link to prevent
1657	 * nasty problems until this is sorted (assuming it's not a
1658	 * VBIOS bug).
1659	 */
1660	if (nv_match_device(dev, 0x040d, 0x1028, 0x019b)) {
1661		if (*conn == 0x02026312 && *conf == 0x00000020)
1662			return false;
1663	}
1664
1665	/* GeForce3 Ti 200
1666	 *
1667	 * DCB reports an LVDS output that should be TMDS:
1668	 *   DCB entry 1: f2005014 ffffffff
1669	 */
1670	if (nv_match_device(dev, 0x0201, 0x1462, 0x8851)) {
1671		if (*conn == 0xf2005014 && *conf == 0xffffffff) {
1672			fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 1, 1, 1);
1673			return false;
1674		}
1675	}
1676
1677	/* XFX GT-240X-YA
1678	 *
1679	 * So many things wrong here, replace the entire encoder table..
1680	 */
1681	if (nv_match_device(dev, 0x0ca3, 0x1682, 0x3003)) {
1682		if (idx == 0) {
1683			*conn = 0x02001300; /* VGA, connector 1 */
1684			*conf = 0x00000028;
1685		} else
1686		if (idx == 1) {
1687			*conn = 0x01010312; /* DVI, connector 0 */
1688			*conf = 0x00020030;
1689		} else
1690		if (idx == 2) {
1691			*conn = 0x01010310; /* VGA, connector 0 */
1692			*conf = 0x00000028;
1693		} else
1694		if (idx == 3) {
1695			*conn = 0x02022362; /* HDMI, connector 2 */
1696			*conf = 0x00020010;
1697		} else {
1698			*conn = 0x0000000e; /* EOL */
1699			*conf = 0x00000000;
1700		}
1701	}
1702
1703	/* Some other twisted XFX board (rhbz#694914)
1704	 *
1705	 * The DVI/VGA encoder combo that's supposed to represent the
1706	 * DVI-I connector actually point at two different ones, and
1707	 * the HDMI connector ends up paired with the VGA instead.
1708	 *
1709	 * Connector table is missing anything for VGA at all, pointing it
1710	 * an invalid conntab entry 2 so we figure it out ourself.
1711	 */
1712	if (nv_match_device(dev, 0x0615, 0x1682, 0x2605)) {
1713		if (idx == 0) {
1714			*conn = 0x02002300; /* VGA, connector 2 */
1715			*conf = 0x00000028;
1716		} else
1717		if (idx == 1) {
1718			*conn = 0x01010312; /* DVI, connector 0 */
1719			*conf = 0x00020030;
1720		} else
1721		if (idx == 2) {
1722			*conn = 0x04020310; /* VGA, connector 0 */
1723			*conf = 0x00000028;
1724		} else
1725		if (idx == 3) {
1726			*conn = 0x02021322; /* HDMI, connector 1 */
1727			*conf = 0x00020010;
1728		} else {
1729			*conn = 0x0000000e; /* EOL */
1730			*conf = 0x00000000;
1731		}
1732	}
1733
1734	/* fdo#50830: connector indices for VGA and DVI-I are backwards */
1735	if (nv_match_device(dev, 0x0421, 0x3842, 0xc793)) {
1736		if (idx == 0 && *conn == 0x02000300)
1737			*conn = 0x02011300;
1738		else
1739		if (idx == 1 && *conn == 0x04011310)
1740			*conn = 0x04000310;
1741		else
1742		if (idx == 2 && *conn == 0x02011312)
1743			*conn = 0x02000312;
1744	}
1745
1746	return true;
1747}
1748
1749static void
1750fabricate_dcb_encoder_table(struct drm_device *dev, struct nvbios *bios)
1751{
1752	struct dcb_table *dcb = &bios->dcb;
1753	int all_heads = (nv_two_heads(dev) ? 3 : 1);
1754
1755#ifdef __powerpc__
1756	/* Apple iMac G4 NV17 */
1757	if (of_machine_is_compatible("PowerMac4,5")) {
1758		fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 0, all_heads, 1);
1759		fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG, 1, all_heads, 2);
1760		return;
1761	}
1762#endif
1763
1764	/* Make up some sane defaults */
1765	fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG,
1766			     bios->legacy.i2c_indices.crt, 1, 1);
1767
1768	if (nv04_tv_identify(dev, bios->legacy.i2c_indices.tv) >= 0)
1769		fabricate_dcb_output(dcb, DCB_OUTPUT_TV,
1770				     bios->legacy.i2c_indices.tv,
1771				     all_heads, 0);
1772
1773	else if (bios->tmds.output0_script_ptr ||
1774		 bios->tmds.output1_script_ptr)
1775		fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS,
1776				     bios->legacy.i2c_indices.panel,
1777				     all_heads, 1);
1778}
1779
1780static int
1781parse_dcb_entry(struct drm_device *dev, void *data, int idx, u8 *outp)
1782{
1783	struct nouveau_drm *drm = nouveau_drm(dev);
1784	struct dcb_table *dcb = &drm->vbios.dcb;
1785	u32 conf = (dcb->version >= 0x20) ? ROM32(outp[4]) : ROM32(outp[6]);
1786	u32 conn = ROM32(outp[0]);
1787	bool ret;
1788
1789	if (apply_dcb_encoder_quirks(dev, idx, &conn, &conf)) {
1790		struct dcb_output *entry = new_dcb_entry(dcb);
1791
1792		NV_INFO(drm, "DCB outp %02d: %08x %08x\n", idx, conn, conf);
1793
1794		if (dcb->version >= 0x20)
1795			ret = parse_dcb20_entry(dev, dcb, conn, conf, entry);
1796		else
1797			ret = parse_dcb15_entry(dev, dcb, conn, conf, entry);
1798		if (!ret)
1799			return 1; /* stop parsing */
1800
1801		/* Ignore the I2C index for on-chip TV-out, as there
1802		 * are cards with bogus values (nv31m in bug 23212),
1803		 * and it's otherwise useless.
1804		 */
1805		if (entry->type == DCB_OUTPUT_TV &&
1806		    entry->location == DCB_LOC_ON_CHIP)
1807			entry->i2c_index = 0x0f;
1808	}
1809
1810	return 0;
1811}
1812
1813static void
1814dcb_fake_connectors(struct nvbios *bios)
1815{
1816	struct dcb_table *dcbt = &bios->dcb;
1817	u8 map[16] = { };
1818	int i, idx = 0;
1819
1820	/* heuristic: if we ever get a non-zero connector field, assume
1821	 * that all the indices are valid and we don't need fake them.
1822	 *
1823	 * and, as usual, a blacklist of boards with bad bios data..
1824	 */
1825	if (!nv_match_device(bios->dev, 0x0392, 0x107d, 0x20a2)) {
1826		for (i = 0; i < dcbt->entries; i++) {
1827			if (dcbt->entry[i].connector)
1828				return;
1829		}
1830	}
1831
1832	/* no useful connector info available, we need to make it up
1833	 * ourselves.  the rule here is: anything on the same i2c bus
1834	 * is considered to be on the same connector.  any output
1835	 * without an associated i2c bus is assigned its own unique
1836	 * connector index.
1837	 */
1838	for (i = 0; i < dcbt->entries; i++) {
1839		u8 i2c = dcbt->entry[i].i2c_index;
1840		if (i2c == 0x0f) {
1841			dcbt->entry[i].connector = idx++;
1842		} else {
1843			if (!map[i2c])
1844				map[i2c] = ++idx;
1845			dcbt->entry[i].connector = map[i2c] - 1;
1846		}
1847	}
1848
1849	/* if we created more than one connector, destroy the connector
1850	 * table - just in case it has random, rather than stub, entries.
1851	 */
1852	if (i > 1) {
1853		u8 *conntab = olddcb_conntab(bios->dev);
1854		if (conntab)
1855			conntab[0] = 0x00;
1856	}
1857}
1858
1859static int
1860parse_dcb_table(struct drm_device *dev, struct nvbios *bios)
1861{
1862	struct nouveau_drm *drm = nouveau_drm(dev);
1863	struct dcb_table *dcb = &bios->dcb;
1864	u8 *dcbt, *conn;
1865	int idx;
1866
1867	dcbt = olddcb_table(dev);
1868	if (!dcbt) {
1869		/* handle pre-DCB boards */
1870		if (bios->type == NVBIOS_BMP) {
1871			fabricate_dcb_encoder_table(dev, bios);
1872			return 0;
1873		}
1874
1875		return -EINVAL;
1876	}
1877
1878	NV_INFO(drm, "DCB version %d.%d\n", dcbt[0] >> 4, dcbt[0] & 0xf);
1879
1880	dcb->version = dcbt[0];
1881	olddcb_outp_foreach(dev, NULL, parse_dcb_entry);
1882
1883	/*
1884	 * apart for v2.1+ not being known for requiring merging, this
1885	 * guarantees dcbent->index is the index of the entry in the rom image
1886	 */
1887	if (dcb->version < 0x21)
1888		merge_like_dcb_entries(dev, dcb);
1889
1890	/* dump connector table entries to log, if any exist */
1891	idx = -1;
1892	while ((conn = olddcb_conn(dev, ++idx))) {
1893		if (conn[0] != 0xff) {
1894			if (olddcb_conntab(dev)[3] < 4)
1895				NV_INFO(drm, "DCB conn %02d: %04x\n",
1896					idx, ROM16(conn[0]));
1897			else
1898				NV_INFO(drm, "DCB conn %02d: %08x\n",
1899					idx, ROM32(conn[0]));
1900		}
1901	}
1902	dcb_fake_connectors(bios);
1903	return 0;
1904}
1905
1906static int load_nv17_hwsq_ucode_entry(struct drm_device *dev, struct nvbios *bios, uint16_t hwsq_offset, int entry)
1907{
1908	/*
1909	 * The header following the "HWSQ" signature has the number of entries,
1910	 * and the entry size
1911	 *
1912	 * An entry consists of a dword to write to the sequencer control reg
1913	 * (0x00001304), followed by the ucode bytes, written sequentially,
1914	 * starting at reg 0x00001400
1915	 */
1916
1917	struct nouveau_drm *drm = nouveau_drm(dev);
1918	struct nvif_object *device = &drm->device.object;
1919	uint8_t bytes_to_write;
1920	uint16_t hwsq_entry_offset;
1921	int i;
1922
1923	if (bios->data[hwsq_offset] <= entry) {
1924		NV_ERROR(drm, "Too few entries in HW sequencer table for "
1925				"requested entry\n");
1926		return -ENOENT;
1927	}
1928
1929	bytes_to_write = bios->data[hwsq_offset + 1];
1930
1931	if (bytes_to_write != 36) {
1932		NV_ERROR(drm, "Unknown HW sequencer entry size\n");
1933		return -EINVAL;
1934	}
1935
1936	NV_INFO(drm, "Loading NV17 power sequencing microcode\n");
1937
1938	hwsq_entry_offset = hwsq_offset + 2 + entry * bytes_to_write;
1939
1940	/* set sequencer control */
1941	nvif_wr32(device, 0x00001304, ROM32(bios->data[hwsq_entry_offset]));
1942	bytes_to_write -= 4;
1943
1944	/* write ucode */
1945	for (i = 0; i < bytes_to_write; i += 4)
1946		nvif_wr32(device, 0x00001400 + i, ROM32(bios->data[hwsq_entry_offset + i + 4]));
1947
1948	/* twiddle NV_PBUS_DEBUG_4 */
1949	nvif_wr32(device, NV_PBUS_DEBUG_4, nvif_rd32(device, NV_PBUS_DEBUG_4) | 0x18);
1950
1951	return 0;
1952}
1953
1954static int load_nv17_hw_sequencer_ucode(struct drm_device *dev,
1955					struct nvbios *bios)
1956{
1957	/*
1958	 * BMP based cards, from NV17, need a microcode loading to correctly
1959	 * control the GPIO etc for LVDS panels
1960	 *
1961	 * BIT based cards seem to do this directly in the init scripts
1962	 *
1963	 * The microcode entries are found by the "HWSQ" signature.
1964	 */
1965
1966	const uint8_t hwsq_signature[] = { 'H', 'W', 'S', 'Q' };
1967	const int sz = sizeof(hwsq_signature);
1968	int hwsq_offset;
1969
1970	hwsq_offset = findstr(bios->data, bios->length, hwsq_signature, sz);
1971	if (!hwsq_offset)
1972		return 0;
1973
1974	/* always use entry 0? */
1975	return load_nv17_hwsq_ucode_entry(dev, bios, hwsq_offset + sz, 0);
1976}
1977
1978uint8_t *nouveau_bios_embedded_edid(struct drm_device *dev)
1979{
1980	struct nouveau_drm *drm = nouveau_drm(dev);
1981	struct nvbios *bios = &drm->vbios;
1982	const uint8_t edid_sig[] = {
1983			0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
1984	uint16_t offset = 0;
1985	uint16_t newoffset;
1986	int searchlen = NV_PROM_SIZE;
1987
1988	if (bios->fp.edid)
1989		return bios->fp.edid;
1990
1991	while (searchlen) {
1992		newoffset = findstr(&bios->data[offset], searchlen,
1993								edid_sig, 8);
1994		if (!newoffset)
1995			return NULL;
1996		offset += newoffset;
1997		if (!nv_cksum(&bios->data[offset], EDID1_LEN))
1998			break;
1999
2000		searchlen -= offset;
2001		offset++;
2002	}
2003
2004	NV_INFO(drm, "Found EDID in BIOS\n");
2005
2006	return bios->fp.edid = &bios->data[offset];
2007}
2008
2009static bool NVInitVBIOS(struct drm_device *dev)
2010{
2011	struct nouveau_drm *drm = nouveau_drm(dev);
2012	struct nvkm_bios *bios = nvxx_bios(&drm->device);
2013	struct nvbios *legacy = &drm->vbios;
2014
2015	memset(legacy, 0, sizeof(struct nvbios));
2016	spin_lock_init(&legacy->lock);
2017	legacy->dev = dev;
2018
2019	legacy->data = bios->data;
2020	legacy->length = bios->size;
2021	legacy->major_version = bios->version.major;
2022	legacy->chip_version = bios->version.chip;
2023	if (bios->bit_offset) {
2024		legacy->type = NVBIOS_BIT;
2025		legacy->offset = bios->bit_offset;
2026		return !parse_bit_structure(legacy, legacy->offset + 6);
2027	} else
2028	if (bios->bmp_offset) {
2029		legacy->type = NVBIOS_BMP;
2030		legacy->offset = bios->bmp_offset;
2031		return !parse_bmp_structure(dev, legacy, legacy->offset);
2032	}
2033
2034	return false;
2035}
2036
2037int
2038nouveau_run_vbios_init(struct drm_device *dev)
2039{
2040	struct nouveau_drm *drm = nouveau_drm(dev);
2041	struct nvbios *bios = &drm->vbios;
2042	int ret = 0;
2043
2044	/* Reset the BIOS head to 0. */
2045	bios->state.crtchead = 0;
2046
2047	if (bios->major_version < 5)	/* BMP only */
2048		load_nv17_hw_sequencer_ucode(dev, bios);
2049
2050	if (bios->execute) {
2051		bios->fp.last_script_invoc = 0;
2052		bios->fp.lvds_init_run = false;
2053	}
2054
2055	return ret;
2056}
2057
2058static bool
2059nouveau_bios_posted(struct drm_device *dev)
2060{
2061	struct nouveau_drm *drm = nouveau_drm(dev);
2062	unsigned htotal;
2063
2064	if (drm->device.info.family >= NV_DEVICE_INFO_V0_TESLA)
2065		return true;
2066
2067	htotal  = NVReadVgaCrtc(dev, 0, 0x06);
2068	htotal |= (NVReadVgaCrtc(dev, 0, 0x07) & 0x01) << 8;
2069	htotal |= (NVReadVgaCrtc(dev, 0, 0x07) & 0x20) << 4;
2070	htotal |= (NVReadVgaCrtc(dev, 0, 0x25) & 0x01) << 10;
2071	htotal |= (NVReadVgaCrtc(dev, 0, 0x41) & 0x01) << 11;
2072	return (htotal != 0);
2073}
2074
2075int
2076nouveau_bios_init(struct drm_device *dev)
2077{
2078	struct nouveau_drm *drm = nouveau_drm(dev);
2079	struct nvbios *bios = &drm->vbios;
2080	int ret;
2081
2082	/* only relevant for PCI devices */
2083	if (!dev->pdev)
2084		return 0;
2085
2086	if (!NVInitVBIOS(dev))
2087		return -ENODEV;
2088
2089	ret = parse_dcb_table(dev, bios);
2090	if (ret)
2091		return ret;
2092
2093	if (!bios->major_version)	/* we don't run version 0 bios */
2094		return 0;
2095
2096	/* init script execution disabled */
2097	bios->execute = false;
2098
2099	/* ... unless card isn't POSTed already */
2100	if (!nouveau_bios_posted(dev)) {
2101		NV_INFO(drm, "Adaptor not initialised, "
2102			"running VBIOS init tables.\n");
2103		bios->execute = true;
2104	}
2105
2106	ret = nouveau_run_vbios_init(dev);
2107	if (ret)
2108		return ret;
2109
2110	/* feature_byte on BMP is poor, but init always sets CR4B */
2111	if (bios->major_version < 5)
2112		bios->is_mobile = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_4B) & 0x40;
2113
2114	/* all BIT systems need p_f_m_t for digital_min_front_porch */
2115	if (bios->is_mobile || bios->major_version >= 5)
2116		ret = parse_fp_mode_table(dev, bios);
2117
2118	/* allow subsequent scripts to execute */
2119	bios->execute = true;
2120
2121	return 0;
2122}
2123
2124void
2125nouveau_bios_takedown(struct drm_device *dev)
2126{
2127}